[PR 79579] Avoid segfault on NULL ipa_edge_args_vector

2017-02-21  Martin Jambor  <mjambor@suse.cz>

	PR lto/79579
	* ipa-prop.c (ipa_prop_write_jump_functions): Bail out if no edges
	have been analyzed.

From-SVN: r245628

gcc/ChangeLog

 2017-02-21  Martin Jambor  <mjambor@suse.cz>
 
+	PR lto/79579
+	* ipa-prop.c (ipa_prop_write_jump_functions): Bail out if no edges
+	have been analyzed.
+
+2017-02-21  Martin Jambor  <mjambor@suse.cz>
+
 	* common.opt (-fipa-cp-alignment): Mark as ignored and preserved
 	for backward compatibility only.
 	* doc/invoke.texi (Option Summary): Remove all references to

gcc/ipa-prop.c

@@ -5040,7 +5040,7 @@ ipa_prop_write_jump_functions (void)
   lto_symtab_encoder_iterator lsei;
   lto_symtab_encoder_t encoder;
 
-  if (!ipa_node_params_sum)
+  if (!ipa_node_params_sum || !ipa_edge_args_vector)
     return;
 
   ob = create_output_block (LTO_section_jump_functions);